So, I've compared this release of YCD - Single Edits from Qobuz to the tracks from the 1987 Promo CD. I took a very fast look at them at Spek, and ran them through Audacity to compare them. To my ears they don't sound bad at all, but, quite curiously to me, they are not exactly the same files.
All of them run at the same speed through the whole thing, which indicate they come from the same master, but they sound a little bit... tweaked - all the tracks from the 2022 release are cutoff at a slightly lower frequency.
Additional things I noted (current release compared to the 87 promo CD):
For Holiday, Everybody, Physical Attraction and Into The Groove, the volume is a bit lower; in Over And Over, it is a bit louder; and in Where's The Party, there is some variation in this matter
In Everybody, Into The Groove and Where's The Party the bass is not as prominent/or the treble is enhanced. I can't say this for sure, as my ears are untrained for this.
Anyway, I think it's curious that they are not the exact same tracks, as they were using the tracks from Promo CDs for other releases of this campaigns, but not for this one. The differences are very subtle (at least to me), but I wonder why there are there at all, as it wouldn't make sense to alter the tracks just this much.